vim-like ctrl+v enter in Emacs

in your Emacs buffer, but you’d rather have one element per line like this
foo
bar
baz
quux

What to do? In vim this is easy:
:%s/,/^M/g

where ^M is inserted using
Ctrl+v

But what to do in Emacs? Turns out it’s just as easy but different (who would have thought …): You can insert the newline character in your replace-string or something other using the keyboard command
C-q C-j

C-q is somewhat like Ctrl-v in vim and C-j is Enter. Easy as pi, yeah!